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CAIE A-Level Chemistry 13.2.1 Organic Reaction Terminology

Practise applying homologous-series, bond-fission, reagent and reaction-type terminology to organic equations.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • define a homologous series using common functional group, general formula and successive CH2 units
  • distinguish homolytic from heterolytic fission by how the bonded electron pair is divided
  • classify addition, substitution, elimination, hydrolysis, condensation, oxidation and reduction from an equation

13.2.1—Organic reaction terminology question 1

[Maximum number: 1]

Fig. 4.1 shows how propane, C3H8\mathrm{C}_{3} \mathrm{H}_{8}, can be converted to propanoic acid, CH3CH2COOH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}.

Fig. 4.1

Fig. 4.1

Reaction 1 in Fig. 4.1 takes place in the presence of sunlight.

C3H8+Cl2→CH3CH2CH2Cl+HCl\mathrm{C}_{3} \mathrm{H}_{8}+\mathrm{Cl}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Cl}+\mathrm{HCl}

The reaction takes place via initiation, propagation and termination steps.

Reaction 1 is initiated by the bond fission of Cl2\mathrm{Cl}_{2}.

State the type of bond fission shown in the initiation step.

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